ComfyUI Node
TS Music Stems
Split music into stems. BS-RoFormer SW gives six; Mel-Band RoFormer gives vocals and instrumental and is the better choice when that is all you need; Demucs is kept for older workflows.
TS Music Stems
- audio
- vocal
- bass
- drums
- others
- instrumental
- guitar
- piano
◄model_namebs_roformer_sw►
◄deviceauto►
◄shifts2►
◄overlap0.50►
◄jobs0►
◄precisionfp16►
CategoryTS/Audio
Inputs (7)
| Name | Type | Default | Description |
|---|---|---|---|
| audio | AUDIO | Audio track to split into stems. | |
| model_name | COMBO | bs_roformer_sw | bs_roformer_sw: six stems, best overall. melband_roformer: vocals + instrumental only, and better at that one split than any six-stem model. htdemucs*: the older engine, kept so saved workflows keep producing what they always produced. |
| device | COMBO | auto | Compute device. auto picks GPU when available, otherwise CPU. |
| shifts | INT | 20–10 | Demucs only: TTA passes. 2 = high quality, 4 = very slow. Ignored by the RoFormer engines. |
| overlap | FLOAT | 0.500–0.9 | Chunk overlap for smoother stitching. The RoFormer engines cap this at 0.5, which is all their windowing can use. |
| jobs | INT | 00–16 | Demucs only: CPU workers for pre-processing. 0 = auto. Ignored by the RoFormer engines. |
| precisionopt | COMBO | fp16 | RoFormer engines only. fp16 runs about twice as fast on half the VRAM; measured against fp32 on real music its error stays at -61 dBFS or below, under the noise floor of the recording. bfloat16 is not offered: these models build their mask through view_as_complex, which does not accept it. |
Outputs (7)
| Name | Type | Description |
|---|---|---|
| vocal | AUDIO | Isolated vocals stem. |
| bass | AUDIO | Isolated bass stem. |
| drums | AUDIO | Isolated drums stem. |
| others | AUDIO | Everything that is not vocals, bass or drums. With BS-RoFormer SW that includes guitar and piano, which are also available separately below. |
| instrumental | AUDIO | The full mix minus vocals. |
| guitar | AUDIO | BS-RoFormer SW only. Blocked on the other engines. |
| piano | AUDIO | BS-RoFormer SW only. Blocked on the other engines. |